Scie-Plas Super-Seals™ offer the ultimate solution in flexible leak-free gel casting.  Scie-Plas Super-Seals™ are cost-effective and completely versatile, and can be positioned anywhere within the gel-casting tray, enabling the user to generate shorter gel lengths without the need for smaller trays.  Reliable, leak-free casting is a certainty, even with boiling agarose, provided the seals are first lined with agarose.  Super-Seals are available for all Scie-Plas horizontal gel-casting trays, and can be made to order for casting trays from other electrophoresis manufacturers.